Glass fiber is an important reinforcing material for the manufacture of fiber reinforced plastics (FRP), and is also used for weaving high temperature resistant fiber cloth.But the glass fiber that has not been treated is brittle, easy to take static electricity after friction, and the surface is smooth, when making the reinforcing material of the resin is not easy to stick with the resin.In the manufacture of fiberglass, a sizing agent (or a bundling agent) must be used in order to make a continuous filament of fiberglass into a yarn, increasing its surface polarity, toughness, and strength.Sizing agent is generally composed of water-based resin film-forming agent, lubricant, coupling agent and other additives (such as antistatic agent), such as emulsion or aqueous solution.Sizing agent plays an important role in the properties of glass fiber and the FRP materials made from it. The role of the film-forming resin is to form a thick and tough continuous protective film on the surface of the fiber to prevent the fiber from being damaged by friction. At the same time, the continuous protective film formed must have good elasticity to suit the high-speed drawing process.Among the sizing agents, film-forming substances that have been used include polyvinyl acetate emulsions, water-based polyurethanes, and water-based epoxy resins.Because water-based polyurethane has excellent abrasion resistance, elasticity and good adhesion properties, water-based polyurethane is a film-forming resin for glass fibers that has always been effective.Because the surface of glass fiber has anionic properties, cationic waterborne polyurethane resin is generally used to obtain good adhesion, and in the sizing process, a dense waterborne polyurethane film can be formed on each fiber, which is suitable for high speed of glass fiber The drawing causes shear forces on the sizing slurry.Mixtures or copolymers of waterborne polyurethane and other waterborne resins can also be used as sizing resin! Sinograce Chemical produces a wide variety of chemical additives with reliable quality. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511

1.Paper-based coating resins have been switched from natural water-based resins such as celluloses to synthetic resin emulsions such as carboxystyrene butadiene emulsions, polyvinyl acetate emulsions, and acrylic emulsions, among which acrylic emulsions have more excellent properties.However, the above resins are still difficult to meet the higher requirements for the development of coated paper. Water-based polyurethane can be used as a binder resin in paper coating agents to increase paper printing strength.Water-based polyurethane aqueous dispersions are also used to coat special papers to make them resistant to hydrocarbon solvents. For example, it is used on smooth lead paper in the food packaging industry in an amount of 8-10g / ㎡, and has sufficient oil resistance. Abrasion-resistant, bending-resistant and folding-resistant, high-gloss elastic transparent film. This coating film has good water resistance and resistance to aromatic and ester hydrocarbon solvents.Due to their good performance at low temperatures, they can be used in cryogenic packaging. 2.Waterborne polyurethane is also suitable for decorative coatings due to its high gloss, elasticity and good compatibility with pigments.It is used as a coating on the outer surface of packaging paper bags and cartons, not only for decoration, but also to increase strength and improve packaging quality.Wallpapers with water-based polyurethane as the topcoat are waterproof and stain resistant and can be washed with water. Compounding water-based polyurethane with other water-based resins can make paper have good performance.The paper coating contains a large amount of filler. Generally, calcium carbonate, porcelain clay, dispersant, and water are ground into a ball mill tank to a suitable fineness.Add this material and water-retaining agent, defoaming agent, whitening agent, and water-based polyurethane emulsion to the high-speed dispersing machine to disperse uniformly to obtain water-based polyurethane paper coating. sinograce chemical produces paper coatings, wetting agents, defoaming agents and other additives for use with polyurethane paper coatings. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511

Polyurethane and general epoxy products application The use of the two products requires strengthened compressive tensile cement floors or floors and drainage ditches that are resistant to corrosion by strong acids and alkalis, such as chemicals, metallurgical plants, electroplating plants, power plants, pharmaceutical plants, PCB circuit board plants, paper mills, Hardware factory, printing and dyeing factory, etc. product feature： 1.Both have good tensile resistance, not cracking, not falling off and other properties; 2.Both are resistant to corrosion of strong acid, alkali and various oil substances 3.Both of them have the properties of dustproof and waterproof surface, such as wear resistance, weight resistance and impact resistance 4.The former finish is suitable for outdoor, the latter for indoor; The greater weakness or weakness of the latter is the fear of strong ultraviolet rays,In the strong ultraviolet radiation will occur yellow change, that is, fade, but will not decompose also affect the use;But the former is much better than the latter in terms of weather resistance, especially the yellowing time is much longer than the latter,In particular, the yellowing time of the former is much longer than the latter, so the former is often used for outdoor construction requirements. sinograce chemical produces polyurethane emulsion, which can be used for peeling coating, wood paint, metal coating, textile leather coating, welcome to the shop for consultation. visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511

Material property (pu for short) is divided into: Pouring polyurethane elastomer (CPU for short) is one of the most widely used polyurethane elastomers with the largest yield. Thermoplastic polyurethane elastomer (TPU) -- thermoplastic polyurethane elastomer accounts for about 25% of the total amount of polyurethane.Mixed polyurethane elastomer (MPU) - accounts for about 10% of the total amount of polyurethane elastomers. TPU material has the hardness and high mechanical strength similar to ordinary thermoplastics, and can be produced by plastic processing. At the same time, it has the elongation, resilience, and deformation recovery properties of ordinary elastomers.Utilizing the high tensile strength and elongation at break of TPUR, especially excellent tear resistance, flexibility and abrasion resistance, various abrasion resistance used in many fields such as automobile, footwear industry, electrical appliances, sports and sports can be prepared , Shock absorption and other components. Mechanical property This material is suitable for working in the harsh environment of long-term load and has excellent wear resistance. Heat-resistant quality The heat resistance of this material is not outstanding. It only allows long-term exposure to a working environment below 80 ° C. Soft and medium hardness TPU can be exposed to 100 ° C for a short time. High hardness grades can be 120 ° C Short-time work in temperature environment.TPU has excellent low temperature performance and high chemical properties. Chemical properties Because it is mainly composed of direct-linked chemical bonds, it has a poor ability to resist the erosion of external media. Therefore, it has poor resistance to acids and alkalis, and has a large swelling property for automotive oil products containing ethanol. Oil and ester media have better resistance. Weather resistance Generally, TPU has good weather resistance. Although it will slightly turn yellow under long-term sunlight, the performance of the material will not be affected much.Generally, UV absorbers are used in the formulations of TPU products for outdoor applications. Sometimes, when conditions permit, carbon black pigments can be added to effectively absorb or block ultraviolet rays and increase the service life of materials. The disadvantage of this type of rubber is that it is not as good as CPU in oil resistance, heat resistance and mechanical properties. sinograce chemical produces polyurethane emulsion, which can be used for peeling coating, wood paint, metal coating, textile leather coating, adhesive.welcome to the shop for consultation. If you want to know more about our products, please click here visit us sinograce chemical: https://www.sinogracechem.com Get a Quote Now :sales@sinogracechem.com Telephone               :+86 0551 63459511